Stripper/packer and blowout preventer with split bonnet

Details Stripper/packer and blowout preventer with split bonnet Stripper/packer and blowout preventer with split bonnet

1996-08-08

1999-01-26

Fox, John

Valves and valve actuation

Blow-out preventers

251 12, E21B 3306

Patent

active

058630228

ABSTRACT:
A stripper/packer which also serves as a blowout preventer includes a split bonnet. The split bonnet comprises a pair of opposed bonnet halves that may be hydraulically actuated into contact with each other and locked in place to form a bonnet over a packer chamber with the body of the packer. The bonnet halves may be locked together by hydraulic actuation of a latch pin or a pair of pins, or a sleeve may be inserted to hold the bonnet halves together. The split bonnet feature provides clear and easy access to a packer element within the packer chamber with coiled tubing or other tubular member through the packer, or with the coiled tubing withdrawn from the packer.

REFERENCES:
patent: 3490525 (1970-01-01), Nettles
patent: 3915426 (1975-10-01), Le Romax

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